text: The complex was first prepared by Wailes and Weigold.  It can be purchased or readily prepared by reduction of zirconocene dichloride with lithium aluminium hydride:
  : (CH)ZrCl  +   LiAlH  →  (CH)ZrHCl  +   LiAlCl
  This reaction also affords (CH)ZrH, which is treated with methylene chloride to give Schwartz's reagent 
  An alternative procedure that generated Schwartzs reagent from dihydride has also been reported. Moreover, its possible to perform an in situ preparation of (CH)ZrHCl from zirconocene dichloride by using LiH. This method can also be used to synthesize isotope-labeled molecules, like olefines by employing LiH or LiH as reducing agents.
  Schwartz's reagent has a low solubility in common organic solvents.  The trifluoromethanesulfonate (CH)ZrH(OTf) is soluble in THF.